Persistent identifiers (PIDs)
Answer
Persistent identifiers (PIDs)
A persistent identifier (PID) is a unique, long-lasting label and/or number associated with a digital object, such as publications, software, and data.
Assigning a PID to a research output means that it will always be findable and trackable online, by both individuals and computers.
PIDs are an important aspect of sharing research in an open and FAIR (Findable, Accessible, Interoperable, Reproducible) manner, allowing for increased discoverability and facilitating the citation of research outputs.
PIDs can be divided into two categories:
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PIDs for digital objects
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PIDs for individuals
PIDs for digital objects
The most consistently-used PID for digital research objects is a DOI (Digital Object Identifier)
PIDs for individuals
The most commonly-used PID for individual researchers is an ORCID (Open Research Contributor ID).
More information
The CERN Scientific Information Service maintain a detailed guide to PIDs for objects, individuals, grants, and organizations.